
Step Drill Bit HSS Ø 6-60mm - Twist Drill Bit, Large Cone Drill for Metal, Wood, Plastic. Large Step Drill Bit - The step drill is designed in 12 drill diameter steps: 6-60mm (6mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm). Unique enlargement holes, no need to replace the drill bit and positioning hole during use. Material - The stepped cone cutter is made of high quality material. Made of HSS 4241 high speed steel and titanium coating on the surface. Rust, wear and heat resistant, longer service life. Spiral Design - The pointed tip 135 split tips and 135 point design double-edged 2 chip flutes guarantee faster and more consistent cutting, stable stock removal and better chip removal. The stem The three-sided design fits securely into the power tool chuck and prevents slipping. Surface depth gauges ensure precise drilling. Water Cooled - For parts with increased hardness. is less than 25° ; For materials such as metal, wood, aluminum alloys, plastic panels,